package com.tech.cloud.service.impl;


import com.tech.cloud.apis.AccountFeignApi;
import com.tech.cloud.apis.StorageFeignApi;
import com.tech.cloud.mapper.OrderMapper;
import com.tech.cloud.po.OrderPO;
import com.tech.cloud.service.OrderService;
import io.seata.core.context.RootContext;
import io.seata.spring.annotation.GlobalTransactional;
import jakarta.annotation.Resource;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import tk.mybatis.mapper.entity.Example;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Resource
    private OrderMapper orderMapper;
    @Resource//订单微服务通过OpenFeign去调用库存微服务
    private StorageFeignApi storageFeignApi;
    @Resource//订单微服务通过OpenFeign去调用账户微服务
    private AccountFeignApi accountFeignApi;


    @Override
    @GlobalTransactional(name = "zzyy-create-order", rollbackFor = Exception.class)
    public void create(OrderPO order) {
        //xid全局事务id的检查，重要
        String xid = RootContext.getXID();
        //1 新建订单
        log.info("---------------开始新建订单: " + "\t" + "xid: " + xid);
        //订单新建时默认初始订单状态是零
        order.setStatus(0);
        int result = orderMapper.insertSelective(order);
        // 插入订单成功后获得插入mysql的实体对象
        OrderPO orderFromDB = null;

        if (result > 0) {
            // 从mysql里面查出刚插入的记录
            orderFromDB = orderMapper.selectOne(order);
            log.info("-----> 新建订单成功,orderFromDB info: " + orderFromDB);

            //2 扣减库存
            log.info("-------> 订单微服务开始调用Storage库存，做扣减count");
            storageFeignApi.decrease(orderFromDB.getProductId(), orderFromDB.getCount());
            log.info("-------> 订单微服务结束调用Storage库存，做扣减完成");

            //3 扣减账户余额
            log.info("-------> 订单微服务开始调用Account账号，做扣减money");
            accountFeignApi.decrease(orderFromDB.getUserId(), orderFromDB.getMoney());
            log.info("-------> 订单微服务结束调用Account账号，做扣减完成");

            //4 修改订单状态
            //将订单状态从零修改为1，表示已经完成
            log.info("-------> 修改订单状态");
            orderFromDB.setStatus(1);

            Example example = new Example(OrderPO.class);
            Example.Criteria criteria = example.createCriteria();
            criteria.andEqualTo("userId", orderFromDB.getUserId());
            criteria.andEqualTo("status", 0);

            int updateResult = orderMapper.updateByExampleSelective(orderFromDB, example);
            log.info("-------> 修改订单状态完成" + "\t" + updateResult);
        }
        log.info("---------------结束新建订单: " + "\t" + "xid: " + xid);

    }
}
